/*
 * Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.oracle.truffle.r.runtime;

import com.oracle.truffle.r.runtime.context.RContext;

/**
 * Denotes the visibility of an output of a built-in.
 */
public enum RVisibility {
    ON,
    OFF,
    /**
     * In GnuR this means by default ON, but C code can change the visibility. In FastR this means
     * that is it left up to the built-in whether and how to call
     * {@link RContext#setVisible(boolean)}. For example, {@code do.call} and similar built-ins do
     * not change the visibility set by the 'inner' node.
     */
    CUSTOM,
}
